00763nam a2200217Ia 4500 0000013777 20251012174529.0 120414s1983 mdu 000 0 eng d 0801828287 0801828295 9780801828287 9780801828294 HE8635 384.091724 19 Telecommunications and economic development Robert J. Saunders, Jeremy J. Warford, Bjorn Wellenius. Baltimore publ. for the World Bank [by] Johns Hopkins University Press 1983. xvi, 395 s. fig. 25 cm. Telecommunication Mathematical models. Telecommunication Developing countries. Developing countries Telecommunication services. 5463 5463